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The perception of tooth colour is multi-factorial. Reflection and absorption of light by the tooth can be influenced by a number of factors including specular transmission of light through the tooth; specular reflection at the surface; diffuse light reflection at the surface; absorption and scattering of light within the dental tissues; enamel mineral content; enamel thickness; dentine colour ...
The appearance and perception of a tooth is the result of a complex interaction of factors such as lighting conditions, translucency, opacity, light scattering, gloss and the human eye and brain. [5] Of these, the intrinsic pigmentation of a tooth is the most influential, [ 4 ] which in turn is determined by genetic and natural factors. [ 6 ]
Teeth blackening. Nishiki-e by Utagawa Kunisada, 1820, from the series Mirrors of the modern boudoir.. Ohaguro (Japanese: お歯黒, pronounced, lit. ' black teeth ') is the name given in Japan to the custom of blackening one's teeth with a solution of iron filings and vinegar.
The most common type is iron-deficiency anemia, in which a lack of iron leads to a reduction in the number of red blood cells or hemoglobin. This can impair oxygen transport throughout the body.
Although low-level consumption of apple cider vinegar is of low risk, particularly if it is diluted, reported adverse effects include esophageal damage, tooth enamel erosion, and excessive burping, flatulence, and bowel movements. [9] Irritation and redness are common when the eyes come into contact with vinegar, and corneal injury can occur. [10]
Remineralization is a natural process and does not have to involve fluoride. Tooth remineralization is the natural repair process for non-cavitated tooth lesions, [1] [2] in which calcium, phosphate and sometimes fluoride ions are deposited into crystal voids in demineralised enamel. Remineralization can contribute towards restoring strength ...
Although many enameled cast-iron cookware pieces are labeled “dishwasher safe,” it is important to know that placing it in the dishwasher can cause some scratches and wear and tear of the ...
Iron deficiency protects against infection by creating an unfavorable environment for bacterial growth. Nevertheless, while iron deficiency might lessen infections by certain pathogenic diseases, it also leads to a reduction in resistance to other strains of viral or bacterial infections, such as Salmonella typhimurium or Entamoeba histolytica ...